I think that Sora started using a tablet to draw these when he drew this.
Business Trip EditionFirst-Time GreetingTouhou DiaryAll right, this time, we're having a business trip edition!ZoomRushClapWhere you going, Reimu?Uh, no...it's not like we're going on a picnic.You sure you get the idea, Reimu?Ah, it's one of those guest appearance things!Huh?